CONTENTS 



No. 1, January, 1920 



Studies in the Metabolism of Actinomycetes. III. Nitrogen Metabolism. 

 Selman A. Waksman 1 



Studies in the Metabolism of Actinomycetes. IV. Changes in Reaction as 

 a Result of the Growth of Actinomycetes upon Culture Media. Selman 

 A. Waksman and Jacob S. Joffe 31 



The Sterilization of Oils by Means of Ultra Violet Rays. Lawrence T. 

 Fairhall and Paul M. Bates 49 



On the Bacillus of Morgan No. 1— A Meta-Colon-Bacillus. Th. Thj0tta. . . 67 



On Methods of Isolation and Identification of the Members of the Colon- 

 Typhoid Group of Bacteria. The Study of Bactericidal Action of CR 

 Indicator. J. Bronfenbrenner, M. J. Schlesinger and D. Soletsky 79 



Extracts of Pure Dry Yeast for Culture Media. S. Henry Ayers and Philip 

 Rupp 89 



A Modified Procedure for the Preparation of Testicular Infusion Agar. Guy 



W. Clark 99 



Description of An Apparatus for Obtaining Samples of Water at Different 

 Depths for Bacteriological Analysis. Frank C. Wilson 103 



No. 2, March, 1920 



Some Bacteriological Aspects of Dehydration. Samuel C. Prescott 109 



Report of the Committee on the Descriptive Chart for 1919. H. J. Conn, 



Chairman, H. A. Harding, I. J. Kligler, W. D. Frost, M. J. Prucha, and 



K. N. Atkins 127 



Notes on the Classification of the White and Orange Staphylococci. C.-E. A. 



Winslow, William Rothberg and Elizabeth I. Parsons 145 



A Spectrophotometric Study of the "Salt Effects" of Phosphates upon the 



Color of Phenolsulfonphthalein Salts and Some Biological Applications. 



Charles L. Brightman, M. R. Meacham and S. F. Acree 169 



A Modification of Loeffler's Flagella Stain. Ivan V. Shunk 181 



Bouillon Cubes as a Substitute for Beef Extract or Meat in Nutrient Media. 



Zae Northrup Wyant 189 



No. 3. May, 1920 



The Families and Genera of the Bacteria. Final Report of the Committee 

 of the Society of American Bacteriologists on Characterization and 

 Classification of Bacterial Types. C.-E. A. Winslow, Chairman, Jean 

 Broadhurst, R. E. Buchanan, Charles Krumwiede, Jr., L. A. Rogers 

 and G. H. Smith 191 



The Production of Hydrogen Sulphide by Bacteria. John T. Myers 231 



